Dau Tu Vertical X21 Joint Stock Company Address: No 31, 139 To 1 Lane, Bang Liet Street, Hoang Liet Ward, Hoang Mai District, Ha Noi City Enterprise code: 0107943279 Phone: 0974279521 Representative: Duong Thi Huong Hoang Liet Ward, Hoang Mai District, Ha Noi CityFounding date: 2 - 8 - 2017